@import url("https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap");

:root {
  color-scheme: light;
  --bg: #f6f4ef;
  --panel: #ffffff;
  --panel-alt: #f0ede7;
  --ink: #1b1b1b;
  --muted: #555550;
  --accent: #0f5b8f;
  --accent-2: #e56a54;
  --border: #e2ddd2;
  --shadow: 0 20px 60px rgba(27, 27, 27, 0.08);
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --msg-font: 15.5px;
  --msg-line: 1.6;
  --msg-padding: 16px 18px;
  --msg-gap: 10px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  font-family: "DM Sans", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, #fff7e8 0%, #f4f2ec 42%, #ede9e1 100%);
}

.app {
  display: grid;
  grid-template-columns: 320px 1fr;
  height: 100vh;
}

.sidebar {
  padding: 16px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.icon-btn {
  border: 1px solid var(--border);
  background: #f7f4ee;
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
}

.sidebar-toggle,
.sidebar-close,
.sidebar-backdrop {
  display: none;
}

.menu-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--border);
  background: #f8f6f2;
  border-radius: 12px;
}

.menu-tab {
  border: none;
  background: transparent;
  border-radius: 8px;
  padding: 8px 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  text-align: center;
}

.menu-tab.active {
  background: #ffffff;
  color: var(--ink);
  box-shadow: 0 2px 10px rgba(27, 27, 27, 0.08);
}

.menu-panel {
  display: none;
  flex: 1;
  overflow-y: auto;
  padding-right: 2px;
  align-content: start;
  gap: 10px;
}

.menu-panel.active {
  display: grid;
}

#menuProjects {
  gap: 8px;
}

.menu-group {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fcfbf8;
  overflow-y: auto;
}

.menu-group summary {
  list-style: none;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  padding: 10px 12px;
  background: #f3efe7;
}

.menu-group summary::-webkit-details-marker {
  display: none;
}

.menu-group .group-content {
  padding: 10px;
  display: grid;
  gap: 8px;
}

#menuChats .chat-list {
  min-height: 200px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  overflow-y: auto;
  flex-shrink: 0;
}

.logo svg {
  width: 100%;
  height: 100%;
  display: block;
}

.brand-title {
  font-weight: 700;
}

.brand-sub {
  font-size: 12px;
  color: var(--muted);
}

.new-chat {
  border: none;
  background: var(--accent);
  color: white;
  padding: 12px 16px;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow);
}

.section-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-top: 8px;
}

.chat-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 160px;
}

.chat-item {
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--panel-alt);
  cursor: pointer;
  font-size: 14px;
  border: 1px solid transparent;
}

.chat-item.active {
  border-color: var(--accent);
  background: #ffffff;
}

.chat-item.shared {
  border-left: 3px solid var(--accent);
  padding-left: 9px;
}

.share-badge {
  display: inline-block;
  font-size: 11px;
  background: var(--accent);
  color: #fff;
  padding: 1px 6px;
  border-radius: 8px;
  margin-left: 6px;
  vertical-align: middle;
}

.settings label,
.tools label {
  display: flex;
  flex-direction: column;
  font-size: 12px;
  gap: 6px;
  color: var(--muted);
}

.auth label,
.workspace label {
  display: grid;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}

.settings input,
.settings textarea,
.settings select,
.tools input,
.tools select,
.auth input,
.workspace input,
.workspace select,
#customTools {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 13px;
  font-family: inherit;
  background: white;
  color: var(--ink);
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.menu-panel .row {
  grid-template-columns: 1fr;
}

.inline {
  display: grid;
  gap: 6px;
}

.hidden {
  display: none;
}

.auth,
.workspace {
  display: grid;
  gap: 8px;
}

.project-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #f8f6f2;
}

.project-icon-tab {
  border: 1px solid transparent;
  background: transparent;
  border-radius: 10px;
  padding: 8px 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 10px;
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
  line-height: 1;
}

.project-icon-tab.active {
  background: #fff;
  color: var(--ink);
  border-color: var(--border);
}

.project-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: inline-grid;
  place-items: center;
  font-size: 10px;
  font-weight: 700;
  background: linear-gradient(180deg, #faf7f0 0%, #f1ece2 100%);
}

.project-panel {
  display: none;
}

.project-panel.active {
  display: grid;
  gap: 8px;
}

.project-workspace {
  gap: 10px;
}

.workspace.project-workspace textarea {
  min-height: 56px;
}

.workspace.project-workspace label {
  font-size: 11px;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

#menuProjects .project-actions .icon-btn-small {
  flex: 1 1 96px;
  justify-content: center;
}

.icon-btn-small {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
}

.btn-glyph {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1px solid currentColor;
  display: inline-grid;
  place-items: center;
  font-size: 10px;
  line-height: 1;
  font-weight: 700;
}

.integration-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.integration-card {
  display: grid;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  background: #fff;
}

.integration-card.compact {
  gap: 8px;
  padding: 10px;
}

.integration-card.compact label {
  font-size: 11px;
}

.integration-card[data-status="connected"] {
  border-color: #b8ddc6;
  background: #f7fcf9;
}

.integration-card[data-status="error"] {
  border-color: #e7bbb2;
  background: #fff7f6;
}

.integration-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.integration-title {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  font-weight: 700;
}

.integration-title::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #c4beb1;
  border: 1px solid #b8b1a1;
}

.integration-card[data-status="connected"] .integration-title::before {
  background: #2f9d56;
  border-color: #277f47;
}

.integration-card[data-status="error"] .integration-title::before {
  background: #cc5d49;
  border-color: #a94a3a;
}

.integration-badge {
  font-size: 10px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 8px;
  background: #faf7f0;
}

.integration-services {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.integration-services .toggle {
  font-size: 11px;
}

.integration-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.integration-actions button {
  flex: 1 1 84px;
  padding: 7px 10px;
  font-size: 11px;
  min-height: 30px;
  white-space: nowrap;
}

.integration-card .import-status {
  min-height: 16px;
  padding-top: 2px;
}

.tooling-summary {
  font-size: 12px;
  color: var(--muted);
  background: #f7f4ee;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  line-height: 1.35;
}

.workspace textarea {
  width: 100%;
  resize: vertical;
  min-height: 72px;
}

#menuProjects .menu-group .group-content {
  padding: 12px;
}

#menuProjects .workspace input,
#menuProjects .workspace select,
#menuProjects .workspace textarea {
  min-height: 36px;
}

#menuProjects .workspace textarea {
  min-height: 72px;
}

.import-status {
  font-size: 12px;
  color: var(--muted);
}

.workspace-files {
  font-size: 12px;
  color: var(--muted);
  display: grid;
  gap: 6px;
}

.workspace-files .file {
  display: grid;
  gap: 2px;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
}

.upload-queue {
  display: grid;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}

.upload-item {
  display: grid;
  gap: 2px;
  padding: 6px 8px;
  border-radius: 8px;
  border: 1px dashed var(--border);
  background: #fcfbf8;
}

.upload-item.uploading {
  border-color: #f0c36a;
  background: #fff7e8;
  color: #8a4b00;
}

.upload-item.done {
  border-color: #c6e8d2;
  background: #eff9f2;
  color: #1c5e3a;
}

.upload-item.failed {
  border-color: #f5b6b6;
  background: #fdecec;
  color: #8a1f1f;
}

.upload-item.skipped {
  border-color: #e2e2e2;
  background: #f6f6f6;
  color: #666666;
}

.upload-item.indexing {
  border-color: #c9d9f5;
  background: #eef3ff;
  color: #2f4a7a;
}

.upload-item.ready {
  border-color: #c6e8d2;
  background: #eff9f2;
  color: #1c5e3a;
}

.upload-name {
  font-weight: 600;
  color: var(--ink);
}

.upload-status {
  font-size: 11px;
}

.upload-error {
  font-size: 11px;
  color: #b42318;
}

.workspace-files .file-name {
  font-weight: 600;
  color: var(--ink);
}

.workspace-files .file-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.workspace-files .file-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.file-status {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #f7f4ee;
}

.file-status.status-ok {
  background: #e9f6ed;
  border-color: #c6e8d2;
  color: #1c5e3a;
}

.file-status.status-pending {
  background: #fff4e5;
  border-color: #f3d1a3;
  color: #8a4b00;
}

.file-status.status-bad {
  background: #fdecec;
  border-color: #f5b6b6;
  color: #8a1f1f;
}

.file-status.status-warn {
  background: #f7f0d8;
  border-color: #ead2a0;
  color: #7a5a12;
}

.file-status.status-unknown {
  background: #f3f3f3;
  border-color: #dddddd;
  color: #666666;
}

.file-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.file-tag {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #faf7f0;
  color: var(--ink);
}

.file-usage,
.file-access {
  font-size: 11px;
  color: var(--muted);
}

.file-error {
  font-size: 11px;
  color: #b42318;
}

.file-notes {
  font-size: 12px;
  color: var(--ink);
  background: #f7f4ee;
  border-radius: 6px;
  padding: 6px 8px;
}

.file-activity {
  margin-top: 8px;
  display: grid;
  gap: 6px;
}

.file-activity-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.file-activity-list {
  display: grid;
  gap: 4px;
  font-size: 12px;
  color: var(--muted);
  max-height: 180px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px;
  background: #fff;
}

.file-activity-item {
  line-height: 1.4;
}

button.secondary.tiny {
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 999px;
}

.auth input,
.workspace input,
.workspace select {
  width: 100%;
}

.auth-actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.auth-actions button {
  border: 1px solid var(--border);
  background: #f7f4ee;
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 12px;
}

.auth-status {
  font-size: 12px;
  color: var(--muted);
}

.toggle {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  width: fit-content;
}

.toggle input {
  margin: 0;
}

.notice {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.4;
  padding: 10px 12px;
  border-radius: 10px;
  background: #fff4dc;
  border: 1px dashed #e1caa4;
}

.proxy-status {
  font-size: 12px;
  padding: 8px 10px;
  border-radius: 10px;
  background: #f7f4ee;
  border: 1px solid var(--border);
  color: var(--muted);
}

.proxy-status.ok {
  color: #0f6a3b;
  border-color: #b7dcc7;
  background: #eef7f1;
}

.proxy-status.bad {
  color: #8a2f1f;
  border-color: #e5b1a6;
  background: #fff1ed;
}

.server-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.server-controls button {
  border: 1px solid var(--border);
  background: #f7f4ee;
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 12px;
}

.server-controls button.secondary {
  color: var(--ink);
}

button.secondary {
  color: var(--ink);
  border: 1px solid var(--border);
  background: #f7f4ee;
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  font-size: 12px;
}

.server-status {
  margin-top: 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #ffffff;
  padding: 12px;
  display: grid;
  gap: 10px;
}

.server-status-title {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.server-status pre {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  white-space: pre-wrap;
}

.diag-body {
  display: grid;
  gap: 8px;
  font-size: 12px;
  color: var(--text);
}

.diag-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.diag-row span {
  color: var(--muted);
}

.diag-row strong {
  font-weight: 600;
}

.diag-note {
  color: var(--muted);
  font-size: 11px;
}

.server-controls button.danger {
  color: #8a2f1f;
  border-color: #e5b1a6;
  background: #fff1ed;
}

.main {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: linear-gradient(180deg, rgba(255, 252, 245, 0.9), rgba(245, 242, 234, 0.9));
}

.topbar {
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.title {
  font-weight: 700;
  font-size: 20px;
}

.subtitle {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.01em;
}

.status {
  font-size: 12px;
  color: var(--muted);
}

.mini-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #ffffff;
  font-size: 12px;
  color: var(--muted);
}

.mini-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #c9c2b7;
}

.mini-status.ok .mini-dot {
  background: #2f9d56;
}

.mini-status.warn .mini-dot {
  background: #c78a00;
}

.mini-status.bad .mini-dot {
  background: #c2563d;
}

.chat {
  flex: 1;
  overflow-y: auto;
  padding: 20px 40px 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.chat > .message {
  animation: fadeInUp 0.18s ease-out;
}

.chat-load-older {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 6px 0 2px;
  color: var(--muted);
  font-size: 12px;
}

.chat-load-older.visible {
  display: flex;
}

.chat-load-info {
  color: var(--muted);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message {
  display: grid;
  gap: var(--msg-gap);
  padding: var(--msg-padding);
  border-radius: 18px;
  max-width: 820px;
  box-shadow: 0 12px 30px rgba(27, 27, 27, 0.08);
  border: 1px solid var(--border);
  line-height: var(--msg-line);
  font-size: var(--msg-font);
}

.message.user {
  align-self: flex-end;
  background: #ffffff;
}

.message.assistant {
  align-self: flex-start;
  background: #fffdf8;
  border-left: 4px solid #eadfce;
}

.message.tool {
  align-self: flex-start;
  background: #eff6fb;
  font-family: var(--mono);
  font-size: 12px;
}

.message-text {
  white-space: pre-wrap;
  word-break: break-word;
  hyphens: auto;
}

.message-text h1,
.message-text h2,
.message-text h3 {
  margin: 0.2em 0 0.4em;
  line-height: 1.2;
}

.message-text h1 { font-size: 1.25em; }
.message-text h2 { font-size: 1.15em; }
.message-text h3 { font-size: 1.05em; }

.message-text p {
  margin: 0.4em 0;
}

.message-text ul,
.message-text ol {
  margin: 0.4em 0 0.6em 1.2em;
  padding: 0;
}

.message-text li {
  margin: 0.2em 0;
}

.message-text code {
  font-family: var(--mono);
  background: #f2efe7;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0 4px;
  font-size: 0.9em;
}

.message-text pre {
  background: #f7f4ee;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  overflow-x: auto;
}

.tool-call {
  display: grid;
  gap: 10px;
  padding: 12px;
  border-radius: 12px;
  background: #ffffff;
  border: 1px solid var(--border);
}

.tool-call-header {
  font-weight: 600;
  font-size: 13px;
}

.tool-call-meta {
  font-size: 11px;
  color: var(--muted);
}

.tool-call-args {
  background: #f7f4ee;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 12px;
  font-family: var(--mono);
}

.tool-call-output-label {
  font-size: 12px;
  color: var(--muted);
}

.tool-call-output {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  font-family: var(--mono);
  font-size: 12px;
}

.tool-call-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tool-call-actions {
  display: flex;
  gap: 8px;
}

.tool-call-actions button {
  border: 1px solid var(--border);
  background: #f7f4ee;
  border-radius: 10px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 12px;
}

.tool-call-actions button.primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.tool-call-status {
  font-size: 11px;
  color: var(--muted);
}

.message pre {
  margin: 0;
  white-space: pre-wrap;
  font-size: 12px;
  line-height: 1.5;
}

.compact {
  --msg-font: 14px;
  --msg-line: 1.45;
  --msg-padding: 12px 14px;
  --msg-gap: 8px;
}

.message img {
  max-width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.composer {
  padding: 12px 24px 16px;
  display: grid;
  gap: 8px;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, #f8f6f1 0%, #f1eee7 100%);
}

.composer-toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
}

.toolbar-btn {
  border: 1px solid transparent;
  background: transparent;
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 4px;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.toolbar-btn:hover {
  background: var(--panel);
  border-color: var(--border);
  color: var(--ink);
}

.toolbar-btn.active {
  background: #e8f0f8;
  border-color: var(--accent);
  color: var(--accent);
}

.toolbar-btn input[type="file"] {
  display: none;
}

.toolbar-icon {
  font-size: 16px;
  line-height: 1;
}

.toolbar-spacer {
  flex: 1;
}

.toolbar-model {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 8px;
  font-size: 12px;
  font-weight: 600;
  font-family: inherit;
  background: white;
  color: var(--ink);
  cursor: pointer;
  min-width: 100px;
}

.toolbar-model:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.composer-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: end;
}

#prompt {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 14px;
  resize: vertical;
  min-height: 44px;
}

.send {
  border: none;
  background: var(--accent);
  color: white;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 600;
  cursor: pointer;
}

.file-btn {
  display: none;
}

.attachments {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.attachment-chip {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
}

.hint {
  font-size: 11px;
  color: var(--muted);
}

@media (max-width: 980px) {
  .app {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: min(92vw, 380px);
    z-index: 30;
    transform: translateX(-103%);
    transition: transform 0.2s ease;
    box-shadow: 0 20px 60px rgba(27, 27, 27, 0.25);
  }

  body.sidebar-open .sidebar {
    transform: translateX(0);
  }

  .sidebar-toggle,
  .sidebar-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 25;
    background: rgba(22, 18, 16, 0.35);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
  }

  body.sidebar-open .sidebar-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .topbar {
    padding: 16px 20px 12px;
  }

  .status {
    display: none;
  }

  .row {
    grid-template-columns: 1fr;
  }

  .chat {
    padding: 16px 20px 0;
  }

  .composer {
    padding: 12px 20px 20px;
  }
}

/* Focus-visible states */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  gap: 16px;
  text-align: center;
  color: var(--muted);
  padding: 40px 20px;
}

.empty-state.hidden {
  display: none;
}

.empty-logo {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  overflow-y: auto;
  font-size: 24px;
}

.empty-state h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
}

.empty-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  max-width: 480px;
}

.suggestion {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
  color: var(--ink);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.suggestion:hover {
  background: #f0ede7;
  border-color: var(--accent);
}

/* Scroll-to-bottom FAB */
.scroll-bottom {
  position: fixed;
  bottom: 100px;
  right: 32px;
  z-index: 20;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: 0 4px 16px rgba(27, 27, 27, 0.12);
  cursor: pointer;
  font-size: 18px;
  display: grid;
  place-items: center;
  color: var(--ink);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.scroll-bottom:hover {
  background: #f0ede7;
  transform: translateY(2px);
}

/* Collaborative chat - sender labels */
.message-sender {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 2px;
}

/* Small phone breakpoint */
@media (max-width: 480px) {
  .chat {
    padding: 12px;
  }

  .composer {
    padding: 8px 12px 14px;
  }

  .message {
    font-size: 14px;
  }

  .sidebar {
    width: 100vw;
  }
}